That sounds just right to not require obsessive water changes.He showed them in the chat room one night. Planted enough and with CO2 If I recall. And a large group of discus.
Really It about the same with macs. Someone told me they needed 75 gallons to a pair, heavily planted and with RODI water to thrive, plus daily water changes. I have proved they do not.
Sorry but that is not fully correct....one COULD be male and the other COULD be female, there is no definitely on that that's for sure. Discus are very difficult to sex correctly by looks
Macs are not as small as you think. However a pair who have become bonded can easily live in a 10 gallon and spawn happily. Then others would require larger just for more room to get away. It all depends on the fish in question.That sounds just right to not require obsessive water changes.
HAHAHAHAHAH 75 gallons heavily planted with RODI water and daily water changes just for 2 little fish. I would say more like 10 gallons or 20 gallons for a pair of bettas. Since bettas are your area of expertise, what size tank would you say a pair of them needs?